Built with many special features Drymax Tennis socks help protect your feet from the rigors of playing tennis. Drymax Tennis socks are designed with a special Dual Layer Moisture Removal System that moves moisture off the skin through the inner Drymax layer to the outer layer almost instantly. Tennis Socks are designed to be used in mild to warm conditions, keeping feet dry, comfortable and odor free. Several features work together as an anti-blister system to actively prevent the formation of blisters. 1) Exceptional 3D fit, 2) Four sock sizes, 3) Seamless insides, 4) An instep-hugging arch band, and 5) Because Drymax socks stay dry, the skin stays dry too; therefore blisters normally caused by sweat or sweat vapor are prevented. Our v3 Tennis Socks possess top and bottom mesh air vents designed to keep feet drier & cooler by working with the built-in vent systems in the new generation of breathable shoes. The MicroZap antimicrobial in the Drymax Fibers is a silver - zirconium phosphate ceramic ion-exchange resin. It fights odor-causing bacteria, helping keep socks odor free. Not a topical treatment; MicroZap is molecularly infused into our Drymax fibers. Being non-migratory and non-toxic, MicroZap provides long term Active Odor Control.